Improvement in sand and gravel separators



S. FRIEND.

sAND AND GRAVEL SEPARATOR. No. 180,569. Patented Aug. 1, 1876.

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SAMUEL FRIEND, OF DECATUR, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHT TOWM. B. CHAMBERS AND WM.- J. QUINLAN, OF SAME PLACE.

IMPROVEMENT IN SAND AND GRAVEL SEPARATORS.

Specification forming part of Letters Patent No. 180,569, dated August1, 1876; application filed Juno 1?, 1876.

To all whom it may concern Be it known that I, SAMUEL FRIEND, ofDecatur, in the county of Macon and in the State of Illinois, haveinvented certain new and useful Improvements in Band or GravelSeparators; and do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, making a partof this specification.

The nature of my invention consists in the construction and arrangementof a machine for separating sand and gravel, as will be hereinafter morefully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which.

Figure 1 is a side elevation of my invention. Fig. 2 is a longitudinalsection of the same. Figure 3 is a side view of the cylinder.

The object of this invention is to furnish a machine that will screensand, wet or dry, with rapidity and greater case than by any other way,producing a more even, regular, and merchantable quality of sand, whichdoes not require a second screening after passing through the separator.Sand screened by this separator can be mixed with loam or clay as may berequiredby manufacturers, plasterers, and masons for their purposes.

The difliculty in screening sand when wet or damp is caused by the sandsticking fast to the gravel, and cannot be screened by any of themachines now generally in use, except at considerable labor and expense,and loss of By the construction of'the rotating cylinder A suchdifficulties are overcome. The cylfinder, having four rows of teeth, a,and revolving with speed, knocks all the sand loose from the gravel androck before striking the screen 5 underneath. At each end of thecylinder is a circular disk or flange, b, which re- VDlves with thecylinder to keep the sand from getting into the journal-bearings of thecyliner. To prevent the screen 13 from clogging or caking, a rod, d, ispivoted to one side of the-frame'of the machine, and the outer end ofthis rod is struck by an arm, f, which is placed on a wrist-pin on apinion, h, upon the journal of the cylinder A. The arm f, striking onthe outer end of the rod d, causes the inner end thereof to beat againstrods 11 t under the screen 13. These rods being full of play, the flowof sand from the cylinder A is whipped through by the rod d.

The machine is so constructed that the cylinder A carries over out ofthe way, beyond the rear of the machine, a large portion of the rock,the remaining portion sliding down the chute C and to one side of themachine in a wheel-barrow or box. The roofing-gravel passes down thescreen B, and over another screen, D, and drops into thespoutE screened,and out at the other side of the machine. Back of the cylinder A is acurved or dished guide, G, which regulates the pitch of the sand, andprevents the gravel and rock from falling down behind the teeth a.

Above the cylinder is a rotating roller, m, which acts as a feeder. Itbeing square or polygonal the sand drops or slides down on this roller.It spreads the sand and throws it forward on the cylinder A. On thefeeder or roller m rests a hinged plate, a, to prevent the sand fromsliding under the roller. This plate also acts in assisting the same topass through regularly.

In the rear of the machine is an inclined screen, H, which catches allthe waste sand that falls from the rocks as they pass over, and thisscreen acts as a cover to prevent the rock or gravel from mixing withthe sand. It is fastened at the lower end with staples or hinges, sothat it can be raised or lowered as required in taking out sand.

One or more rodscreens, I, are placed at the top of theframe, which thesand first strikes, in order to catch the largest rocks as they slideoff in the box-screen C hanging in front of the frame.

With this machine all gravel and rock are carried out of the way withoutany additional expense.

On the side of the machine is mounted a cog-wheel, J, provided with acrank, K, and this wheel meshes with the pinion h for rotating thecylinder, and also with a pinion, p, on

the journal of the roller m, for rotating the same.

Having thus fully described my invention, what I claim as new, anddesire torsecure by Letters Patent, is-

1. In a sand-and-gravel separator, the rotatin g, spreading, and feedingsquare or pol yg and for the purposes herein set forth.

3. The rotating cylinder A, provided with the teeth a and flanges b, incombination with the guide G and screens B H, substantially as and forthe purposes herein set forth.

4. The combination of the screen B having rods 6 i, the beater d, arm f,and crank-pinion h, substantially as and for the purposes herein setforth.

5. The combination of the screens B, H, and D, and box E, with therotating cylinder A, having teeth a and flanges b, all substantially asand for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this23d. day of May, 1876.

SAMUEL FRIEND.

Witnesses:

J. H. PHILLIPS, W. M. BOYD.

